it sounds like the IPSW file format is corrupted. the customer might have run a beta or jailbroken version of iOS which can usually be 1 of many reason for error 51
delete the existing saved IPSW in the iTunes directory
-
-
for Mac
# Launch Finder
# Click Go from the menu bar
# Scroll down and click ‘Go to Folder’
# Type in “~/Library” and click Go
# Click and open the iTunes folder
# Open the iPhone Software update
# Delete the.IPSW files
-
#
for Windows
# Go to C:\Users\Your Computer Name\AppData\Roaming\iTunes\iPhone Software Update
# Find the.IPSW file and delete or you can press CTRL +A (control all) and hit the delete on your keyboard.
# Update the iPhone again.
# trying an update after this procedure should force iTunes to download a new file format [br]
[br]
try downloading a fresh IPSW image currently Apple only sign 11.4.1 and Proceed to update the iPhone
hope this works if that doesn’t work. you might wanna give FoneDog toolkit IOS system recovery a try
it sounds like the IPSW file format is corrupted. the customer might have run a beta or jailbroken version of iOS which can usually be 1 of many reason for error 51
delete the existing saved IPSW in the iTunes directory
+
+
for Mac
# Launch Finder
# Click Go from the menu bar
# Scroll down and click ‘Go to Folder’
# Type in “~/Library” and click Go
# Click and open the iTunes folder
# Open the iPhone Software update
# Delete the.IPSW files
+
#
+
for Windows
-
#
-
-
# for Windows
# Go to C:\Users\Your Computer Name\AppData\Roaming\iTunes\iPhone Software Update
# Find the.IPSW file and delete or you can press CTRL +A (control all) and hit the delete on your keyboard.
# Update the iPhone again.
# trying an update after this procedure should force iTunes to download a new file format [br]
[br]
+
try downloading a fresh IPSW image currently Apple only sign 11.4.1 and Proceed to update the iPhone
-
# hope this works if that doesn’t work. you might wanna give FoneDog toolkit IOS system recovery a try
+
hope this works if that doesn’t work. you might wanna give FoneDog toolkit IOS system recovery a try
it sounds like the IPSW file format is corrupted. the customer might have run a beta or jailbroken version of iOS which can usually be 1 of many reason for error 51
delete the existing saved IPSW in the iTunes directory
for Mac
# Launch Finder
# Click Go from the menu bar
# Scroll down and click ‘Go to Folder’
# Type in “~/Library” and click Go
# Click and open the iTunes folder
# Open the iPhone Software update
# Delete the.IPSW files
#
# for Windows
# Go to C:\Users\Your Computer Name\AppData\Roaming\iTunes\iPhone Software Update
# Find the.IPSW file and delete or you can press CTRL +A (control all) and hit the delete on your keyboard.
# Update the iPhone again.
# trying an update after this procedure should force iTunes to download a new file format [br]
[br]
try downloading a fresh IPSW image currently Apple only sign 11.4.1 and Proceed to update the iPhone
# hope this works if that doesn’t work. you might wanna give FoneDog toolkit IOS system recovery a try
cheers